The Uses and Advantages of Corrugated Plastic

The Uses and Advantages of Corrugated Plastic There are two main types of corrugated plastic. Corrugated plastic sheet usually comprises what appear to be three layers - two flat sheets with a ribbed center layer. In fact, they are really two layers, often referred to as twinwall plastic. Corrugated plastic can also mean sheets of plastic which are wave-like in profile and may be reinforced with chopped glass fiber. They are a single layer and used mainly for roofing of garages and outhouses, but gardeners also use them to build sheds. Here we will focus on the twinwall version, also known as a corrugated plastic board or fluted plastic board. How Corrugated Plastic Sheets Are Made The materials used include polypropylene and polyethylene, widely used and versatile thermoplastics. Polypropylene has a neutral ph and is resistant to many chemicals at normal temperatures, but can be dosed with additives to provide a variety of other resistance such as UV, anti-static and fire resistance, for example. Polycarbonate is also used, but this is a much less versatile material, particularly in respect of its relatively poor impact resistance and brittleness, although it is stiffer. PVC and PET are also used. In the basic manufacturing process, the sheet is extruded - that is the molten plastic is pumped (typically with a screw mechanism) through a die which provides the profile. Dies are typical 1 - 3 meters wide, delivering a product of thickness up to 25 mm. Mono- and co-extrusion techniques are used depending on the precise profile required. Advantages and Uses In buildings: Suppliers claim it is an ideal material for storm shutters and that it is 200 times stronger than glass, 5 times lighter than plywood. It does not require painting and maintains its color, it is translucent and does not rot. Clear polycarbonate corrugated sheet is used for roofing sunrooms where its rigidity, lightweight and insulating properties are ideal, and low impact resistance is less of an issue. It is also used for small structures such as greenhouses where its air core provides a useful insulating layer. Humanitarian Relief: The material is ideal for temporary shelters need after flood, earthquake and other disasters. The lightweight sheets are easily transported by air. Easy to handle and fix to wooden frames their waterproof and insulating properties offer rapid shelter solutions when compared to traditional materials such as tarpaulins and corrugated steel sheets. Packaging: Versatile, flexible and impact resistant, polypropylene board is ideal for packaging components (and agricultural produce too). It is more eco-friendly than some molded packaging which cannot be recycled. It can be stapled, stitched and easily cut to shape with a hobby knife. Signage: It is available in a wide variety of colors, is readily printed on (typically using UV printing) and can easily be fixed using a wide variety of methods - its light weight being an important factor. Pet enclosures: It is such a versatile material that rabbit hutches and other domestic pet enclosures are built with it. Fittings such as hinges can be bolted to it; being non-absorbent and easy to clean it offers a very low maintenance finish. Hobby Applications: Modellers are using it to build airplanes, where its light weight combined with rigidity in one dimension and flexibility at right angles provides properties ideal for wing and fuselage construction. Medical: In an emergency, a section of a sheet can be rolled around a broken limb and taped into place as a splint, also providing impact protection and body heat retention. Corrugated Plastic: the Future The uses that this category of board are put to demonstrate its fantastic versatility. New uses are being identified almost every day.  For example, a patent has recently been filed to use layered sheets (alternate layers fused at right angles) in air-to-air heat exchangers. Demand for corrugated plastic is sure to grow, but as many of the plastics used are dependent on crude oil, the raw material costs are subject to the fluctuations (and inevitable growth) of oil prices. This may prove to be a controlling factor.

hello my beel essays

hello my beel essays William Faulkner ¡s  ¡A Rose for Emily ¡ has been interpreted in many different ways. Most of these rely solely on hints found within the story. I believe that his life can also help one analyze this story. By knowing that Faulkner ¡s strongest influence was his independent mother, one can guess that Miss Emily Grierson ¡s character was based partly on Maud Falkner. William Cuthbert Faulkner was born in New Albany, Mississippi on September 25, 1897. His family moved to Oxford, Mississippi when Faulkner was five years old (Larinde). His parents were Murry and Maud Falkner (Zane 2). Faulkner added the  ¡u ¡ to his last name on his Royal Air Force application for unknown reasons (5). Faulkner ¡s great-grandfather, Colonel William C. Falkner had moved from Tennessee to the Mississippi Delta in 1841. The Colonel was a Civil War hero, plantation owner, railroad builder, and even a writer (Larinde). Faulkner ¡s grandfather and father were both respected, though not wealthy. They were also both alcoholics. Faulkner and his father never had a very good relationship. He and his mother, though, were very close. Maud gave him his love of art and literature. She influenced Faulkner more than anyone else with her strong independence (Zane 3-4). She may have been the inspiration for the strong, independent character, Emily Grierson.  ¡William Faulkner was a quiet but mischievous child, polite and rude, loving and withdrawn ¡ (4). He did well in grade school, but began showing signs of truancy during adolescence. Faulkner dropped out of high school in eleventh grade. In 1918, Faulkner attempted to enlist in the U.S. Army but was turned down. He then applied to the Royal Air Force where he adds the  ¡u ¡ to his last name. He was soon discharged and returned to Oxford, Mississippi. Here he attended the university for two year.  ¡In the decade that followed, Faulkner donned a host of other identities, alter...

Nationalism Essay Example | Topics and Well Written Essays - 250 words - 6

Nationalism - Essay Example One of the significant roles it played in this era was leading of unity between nations. As a result, people were able to talk with one voice and establish a nation based on their ideas, values, languages, and customs. For example, in this period, Italy was controlled by various nations. Nationalist beliefs led to upset of Italians due to control by various foreign rulers. Hence, there was formation of nationalist group such as Young Italy. The group and others organized revolt in various parts of country under different rulers. The foreign rulers were toppled and driven out of the country. As a result, Italians were able to be united. Moreover, the idea of nationalism in this period led to establishment of independent states. Nationalism led to resentment against foreign rule. At this period, there was dynastic authority in various parts of Europe. The call for nationalism led to war such as eight-year war against Ottoman rule. The consequence of the war was independence of various states such as Greek. On the other hand, nationalist ideas led to rise of revolutions. Most of the revolutions in this era called for political changes especially with hardship experienced by people. One of such war was the Franco-Prussian war that lasted for half a year. The war led to defeat of France and the formation of German